TABLE 2.
Study population demographics
| Demographic parameter | Breakthrough infections | Unvaccinated infections | All others uninfecteda |
|---|---|---|---|
| No. | 246 | 144 | 289 |
| Gender | |||
| Male | 95% | 95% | 92% |
| Female | 5% | 5% | 8% |
| Age (yrs) | |||
| Male: Mean ± SD | 69.5 ± 10.7 | 64.4 ± 14.1 | 69.6 ± 11.0 |
| Age range | 37 to 98 | 27 to 91 | 28 to 90 |
| Female: Mean ± SD | 60.5 ± 15.5 | 58.9 ± 8.2 | 58.3 ± 10.7 |
| Age range | 32 to 77 | 48 to 69 | 33 to 80 |
| Clinical status | |||
| Outpatients (%) | 89.0% | 66% | 93% |
| COVID hospitalized (%) | 8.0% | 24%b | 0% |
| Non-COVID hospitalized (%) | 3.0% | 10% | 7.0% |
a
Includes two- and three-dose vaccinated as well as unvaccinated patients with or without a history of recovered infection but with no active or recent SARS-CoV-2 infection at the time of evaluation.
b
P < 0.05 compared to breakthrough infection group, Fisher’s exact test.